Criminal Minds - - Season 2eps23

: Keith Carradine returns as Frank, arguably the BAU’s most prolific and haunting nemesis, who strikes Gideon personally by murdering his girlfriend, Sarah.

: A young Elle Fanning guest stars as Tracy Belle, a child from a previous case whom Frank kidnaps to leverage against the team. Criminal Minds - Season 2Eps23

: The episode ends with the dramatic and disturbing joint suicide of Frank and his obsession, Jane, who jump in front of a train together at Union Station. : Keith Carradine returns as Frank, arguably the

: This episode introduces Erin Strauss (Jayne Atkinson), who becomes a long-term antagonist for the BAU as she pressures Prentiss to spy on Hotch. S2E23 - “The Evilolution of Frank” — Unsubs : This episode introduces Erin Strauss (Jayne Atkinson),

In the Criminal Minds Season 2 finale, "," the standout feature is Hotch’s fierce defense of his team against Section Chief Erin Strauss .